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RE: Question regarding GLB

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I have done some GLB repair and, when I have, I have engaged the services of
specialty experts in the field of Glu-Lam Beam repair. The essense of their
guidance is that, if the GLB is stressed much beyond 50% of the beam's
original capacity, use a new beam (or beams) to support the load. This is
because the testing that has been done demonstrates that there is not much
load sharing going on between a GLB and a steel beam (i.e., channel) bolted
to the side(s) of the beam. You might just want to consider the existing
beam is something convenient to transfer the existing loads to the new beam
and call it a day. But, heck, it's your liability. Do what you want.


Bill Allen, S.E.
Laguna Niguel, CA

=>-----Original Message-----
=>From: JANELLE L. PERRY [mailto:jlp(--nospam--at)]
=>Sent: Wednesday, December 08, 1999 2:25 PM
=>To: seaint(--nospam--at)
=>Subject: Question regarding GLB
=>I have been asked to design a repair for a Glue-Lam beam approx. 20-30
=>years old.
=>The beam seems to have failed in tension at a finger-joint in
=>the bottom
=>lamination and delaminated up from the failure 3' and above
=>the failure
=>at the center of the beam. (or vice versa, I suppose).
=>The beam is in an exposed condition, which makes the fix more
=>It is a 5 1/8" x 18" beam spanning 30' with the failure
=>occurring about
=>10' from the face of support.  The beam holds about 15' of tributary
=>tile roof, sloped at approx. 4:12.
=>I would appreciate any help or guidance.